Sigma Forms Pro <= 1.4.5 - Unauthenticated Unauthenticated Arbitrary File Upload Leading to Remote Code Execution via Pre-built Template File Upload Field
| CVE | CVE-2026-14494 |
|---|---|
| CVSS | 9.8 (Critical) |
| Publicly Published | August 28, 2026 |
| Last Updated | August 29, 2026 |
| Researcher |
d.v4n_s3c
|
Description
The Sigma Forms Pro plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.4.5 via the handle_form_submission function. This is due to the plugin dynamically granting the unfiltered_upload capability to all users during form submissions and bypassing MIME type validation when allowed_file_types is not configured. This makes it possible for unauthenticated attackers to execute code on the server. Several default pre-built templates including Job Application, Support Ticket, and Wholesale Application have file upload fields with no file type restrictions configured by design, making this vulnerability immediately exploitable upon installation.
Learn more about Arbitrary File Upload vulnerabilities and how to prevent them.
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Vulnerability Details for SigmaForms Pro – AI Generated Forms
| Software Type | Plugin |
|---|---|
| Software Slug | sigmaforms-pro |
| Patched? | Yes |
| Remediation | Update to version 1.4.6, or a newer patched version |
| Affected Version |
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| Patched Version |
|
Recent vulnerabilities in SigmaForms Pro – AI Generated Forms
| # | Title | CVE ID | CVSS | Researchers | Date |
|---|---|---|---|---|---|
| 1 | SigmaForms Pro <= 1.4.11 - Unauthenticated Arbitrary File Deletion via Path Traversal in File Upload Field | CVE-2026-78657 | Doan Dinh Van, Hieus | September 1, 2026 | |
| 2 | Sigma Forms Pro <= 1.4.5 - Unauthenticated Arbitrary File Upload | CVE-2026-52705 | Nguyen Ba Khanh | June 15, 2026 |
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